chore(deps): update dependency fast-uri to v3.1.6 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
fast-uri	3.1.5 → 3.1.6

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fast-uri vulnerable to host confusion via skipped IDN canonicalization on scheme-relative references

CVE-2026-75931 / GHSA-5jgf-p345-68v8

More information

Details

Impact

fast-uri canonicalizes a host to its ASCII form only when the input carries an explicit scheme. When resolve() resolves a scheme-relative reference (//host/) against a scheme-bearing base, it still emits the host verbatim even though the effective scheme is known, so re-parsing the resolved URI yields a different host than the one resolve() returned. An application that resolves an untrusted reference with fast-uri and then checks or routes on the resulting host can make a policy decision on one host and reach another. This is an incomplete-fix variant of CVE-2026-13676, whose IDN canonicalization was applied only to the scheme-bearing form.

Patches

Upgrade to fast-uri 2.4.5, 3.1.6, or 4.1.3. resolve() now canonicalizes the host once the effective scheme is known, and fails closed if a raw non-ASCII host cannot be converted.

Workarounds

Resolve scheme-relative references against a base that carries a scheme before performing any host-policy or origin check.

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

• https://github.com/fastify/fast-uri/security/advisories/GHSA-5jgf-p345-68v8
• https://nvd.nist.gov/vuln/detail/CVE-2026-75931
• https://github.com/fastify/fast-uri/commit/0256bc8d1f28b5d0ac657faf67e2411a189dfcb5
• https://github.com/fastify/fast-uri/commit/444ecdad447db2cc23c4d422acc6f0daa6fa8eef
• https://github.com/fastify/fast-uri/commit/4e4ebd8b245f6ca16e448203559eea3e545453a3
• https://cna.openjsf.org/security-advisories.html
• https://github.com/fastify/fast-uri/releases/tag/v2.4.5
• https://github.com/fastify/fast-uri/releases/tag/v3.1.6
• https://github.com/fastify/fast-uri/releases/tag/v4.1.3
• https://github.com/advisories/GHSA-5jgf-p345-68v8

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

fastify/fast-uri (fast-uri)

v3.1.6

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